BNSF 5636 (AC4400CW) approaches a county road crossing in east Keenesburg, Colorado as it heads to Denver on the Brush Sub.

BNSF 5636 (AC4400CW) leads into the elevated curve at Keenesburg, Colorado as runs solo lead on a loaded coal train to Denver.

A colorful Colorado Sunrise at Keenesburg bathes BNSF 8543 (SD70ACe) in a red glow as it runs west towards Denver on the Brush Sub.

A fresh-looking BNSF 3640 (ET44ACH) muscles a loaded coal train through the cut in Keenesburg, Colorado.

A colorful sunrise greets the California Zephyr as it runs through Keenesburg, Colorado on the Brush Sub.

The California Zephyr runs east on the Brush Sub between Hudson and Keenesburg, Colorado.

BNSF 5819 (ES44AC) leads a loaded coal train through the elevated curve at Keenesburg, Colorado.

Amtrak engine #201 (P42DC) leads a late California Zephyr through the Keenesburg Cut on the Brush Sub.

Amtrak engine #15 (P42DC) leads the California Zephyr through Keenesburg, Colorado as a pastel sunrise greets the crew and passengers.

The California Zephyr runs through Keenesburg as the sunrise casts an orange glow on the stainless-steel cars and silver engines.

BNSF 9028 (SD70ACe) runs past the wild sunflowers on the Brush Sub between Roggen and Keenesburg.

BNSF 9018 (SD70ACe) leads a loaded coal train through Keenesburg, Colorado on the Brush Sub.

BNSF 9018 (SD70ACe) leads a coal train through Keenesburg, Colorado as it heads west on the Brush Sub.

BNSF 9018 (SD70ACe) leads a loaded coal train through 'The Cut' at Keenesburg, Colorado as it runs west on the Brush Sub.

BNSF 7678 (ES44DC) leads a freight through Keenesburg, Colorado on the Brush Sub.